(19)

(11)

EP 1 573 903 A1

(12)

(43) Date of publication: 14.09.2005 Bulletin 2005/37 (21) Application number: 03772563.7 (22) Date of filing: 25.11.2003

(51) International Patent Classification (IPC)7: H03F 1/32 (86) International application number: PCT/IB2003/005458 (87) International publication number: WO 2004/055975 (01.07.2004 Gazette 2004/27)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 18.12.2002 US 321505 (71) Applicant: Nokia Corporation 02150 Espoo (FI)	(72) Inventors: KYBETT, Richard CamberleySurrey GU16 6LZ (GB) JENKINS, William London SW16 2LH (GB) (74) Representative: Eisenführ, Speiser & Partner  Patentanwälte Rechtsanwälte, Postfach 31 02 60 80102 München 80102 München (DE)